Triple-Negative Breast Cancer: A Comparison of Race and Survival
Triple-negative breast cancer (TNBC) is an aggressive subtype of breast cancer with a high prevalence in blacks. South Carolina demographically has a high percentage of blacks. This study examines survival and recurrence associated with TNBC in black and white women. A retrospective review of breast cancer patients within the Palmetto Health Cancer Registry was performed from 1999 to 2015. Patient demographics and tumor characteristics were collected and correlated with outcomes. Overall survival (OS), disease-specific survival (DSS), and recurrence-free survival (RFS) were analyzed. The total number of breast cancer patients in the registry was 1723 (1085—white and 638—black). The median follow-up was 48.4 months. The majority of cancers diagnosed in both cohorts were early stage (I, IIA, IIB, 93.4% vs 90.4% P = NS). We identified 332 patients with TNBC. Of those 332 patients, 144 (43.4%) were whites and 188 (56.6%) were blacks. Older age (P = 0.01), high-grade (P < 0.001), and black race (P < 0.001) were significantly associated with TNBC on multivariate analysis. Five- and 10-year OS was significantly worse in blacks with TNBC (P < 0.001). There was no difference in DSS or RFS between the two cohorts. TNBC disproportionately affects black women and is an aggressive subtype of breast cancer with limited treatment options compared with receptor-positive breast cancer. Black patients with TNBC in our study had statistically worse OS. These findings are similar to what has been reported in the literature and prompts further research in newer targeted therapies.
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Document Type: Research Article
Publication date: 01 June 2018
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